Registration Dossier

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2009-10-22 to 2010-07-12
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
static method
Specific details on test material used for the study:
Component of a Polyurethane System
Polyoxypropylene triamine
(39423-51-3) 60-100%
Key result
Temp.:
20 °C
Vapour pressure:
6.82 mBar
Conclusions:
The vapour pressure of the substance is determined to be 6.82 mbar at 20°C.
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
September - October 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
not specified
Type of method:
other: both the dynamic and static method were used to cover a larger temretarure range
Specific details on test material used for the study:
- Batch No.: 8B413
- Manufacturing date: 2018-02-26
- Purity: 100%
- Storage conditions: Preserved at cool temperature below 8 °C. Avoid direct sunlight.




Key result
Temp.:
20 °C
Vapour pressure:
0.002 Pa
Remarks on result:
other: results calculated using the regressed Antoine’s law
Key result
Temp.:
25 °C
Vapour pressure:
0.004 Pa
Remarks on result:
other: results calculated using the regressed Antoine’s law

The vapour pressure measurements were performed in September and October 2018.

The results are presented in the following Table 1.

The measured data is self-consistent, as shown by the coefficient of determination: R²=0.9992. Data from 69.3 to 149.6 °C were measured with the static method and those from 194.9 to 242.2°C with the ebulliometric method.

Table 1: Data recorded during the experiment

Texp

Pexp

1/Texp

ln(Pexp)

[°C]

[mbar]

[K-1]

with Pexp in mbar

69.33

0.004

0.00292

-5.63

89.55

0.016

0.00276

-4.13

109.81

0.049

0.00261

-3.02

129.86

0.155

0.00248

-1.87

149.61

0.478

0.00237

-0.74

194.93

4.71

0.00214

1.55

207.50

7.30

0.00208

1.99

220.42

10.74

0.00203

2.37

228.05

13.60

0.00200

2.61

231.46

15.63

0.00198

2.75

242.21

21.14

0.00194

3.05

Texp = Experimental temperature (°C)

Pexp = Experimental pressure (mbar)

The measured vapour pressures from Table 1 were used to regress the coefficients of Antoine’s law reported in Table 2. The calculated pressures are given in Table 3.

Table 2: Antoine’s law coefficients

Temperature

K

Pressure

mbar

A

18.491

B

-7218.118

C

-45.804

Tmin

69.33 °C

Tmax

242.21 °C

Table 3: Average of measured values and calculated data with Antoine’s law coefficients

Texp

Pexp

Pcalc

Pexp -Pcalc

ΔP/P

(%)

[°C]

[mbar]

[mbar]

[mbar]

69.33

0.004

0.003

0.001

23.3

89.55

0.016

0.014

0.002

17.4

109.81

0.049

0.054

-0.005

9.5

129.86

0.155

0.180

-0.025

13.9

149.61

0.478

0.518

-0.04

7.8

194.93

4.71

4.05

0.66

16.4

207.50

7.30

6.63

0.67

10.1

220.42

10.74

10.71

0.03

0.3

228.05

13.60

14.02

-0.43

3.1

231.46

15.63

15.78

-0.15

1.0

242.21

21.14

22.62

1.48

6.5

Conclusions:
Vapor pressure measurements were performed between 69.3 and 242.2°C using two methods: the static apparatus from 69.3 to 149.6°C and an ebulliometer for temperature ranging from 194.9 to 242.2°C.
The parameters of Antoine’s law were regressed on experimental data from 69.3 and 242.2°C. The vapour pressure of the test substance which is not measurable at 20 and 25°C was calculated using the regressed Antoine’s law.
The vapour pressure of the test substance at 20°C is 0.000023 mbar (2.3 E-3 Pa).
The vapour pressure of the test substance at 25°C is 0.000041 mbar (4.1 E-3 Pa).

Description of key information

The vapour pressure of the test substance was determined to be 0.000023 mbar (2.3 E-3 Pa) at 20°C and 0.000041 mbar (4.1 E-3 Pa) at 25°C using both the static and dynamic method according to EU test method A.4 (Canet, 2018) and was assigned as the key study.

In a supporting study, the vapour pressure of the test substance was determined to be 6.82 mbar at 20°C, following EU test method A.4 using only the static method (Baker, 2010).

Key value for chemical safety assessment

Vapour pressure:
0.002 Pa
at the temperature of:
20 °C

Additional information